The Olympus 4 features:

• Balanced cushioning paces your heel and forefoot the same distance from the ground to encourage proper, low-impact form throughout your run
• Footshape?toe box allows your toes to relax and spread out naturally for more comfort and stability
• Innerflex?grid-like grooves in the midsole allow your foot to flex while being lighter, for more speed and better performance
• Gaitertrap?hook-and-loop tab allows strapless gaiter attachment that prevents debris from building up beneath the shoe
• Trailclaw?canted lugs positioned strategically beneath the metatarsals to provide traction at toe off
• A high performance Vibram Megagrip?sticky rubber compound featuring unparalleled grip on wet and dry surfaces, rugged longevity and optimal ground adaptability
• Engineered knit upper